Hello, my name is Sander Heilbron
and I am a specialist in
Web Performance

Specialized consultant focused on Web performance, Technical SEO, and Accessibility, helping organizations build fast, discoverable, and inclusive digital platforms.

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Sander Heilbron
Sander Heilbron
Team collaboration
About me

It started with a Commodore 64

And never really stopped, driven by a lifelong curiosity for technology and how it shapes the web we use today.

Where it began

I still remember the moment I first got my hands on a computer. It was the eighties, and my very first machine was a Commodore 64. Like many others at the time, I was initially drawn to it by the games; it was hard not to be fascinated by the magic that seemed to come to life on the screen. But it didn't take long before curiosity pulled me in even further.

I started learning BASIC, typing in lines of code from magazines and experimenting to see what would happen. Soon after, I ventured into machine language, trying to understand what was really going on under the hood of the C64. It marked the beginning of a lifelong fascination with how computer technology works.

Connecting before the internet

At some point, I expanded my setup with a 75/1200 baud modem, the Telcom 1200. Through that modem, I discovered Bulletin Board Systems (BBS). These were early online communities where you could upload and download software, read news, and exchange messages with others. Downloading games was especially popular, but for me, it was more than that, it was a glimpse into a connected world. Looking back, those BBS experiences were my personal introduction to what would later become the internet.

Discovering the web

Years later, in the mid-nineties, while studying Commercial Economics, I encountered the internet for the first time. I was immediately intrigued, not just by the technology itself, but by the possibilities it created. Websites were still new, and I became fascinated by their technical aspects and potential as a platform for communication and business.

My first real opportunity came in the late nineties, when I was involved in building a website from a marketing perspective, something that was still in its infancy at the time. It focused on bringing people together, and made me realize the potential of the web as a platform for connection, communication, and growth.

Where marketing meets technology

From there, my career evolved into the world of media agencies, just as internet advertising began to take off. Working with leading platforms, publishers, and advertisers during this period of rapid growth, I developed a strong interest in the technical side of measuring, delivering, and optimizing digital advertising.

Over time, my focus shifted toward SEO, web performance, and accessibility. Today, I help organizations build and optimize their own digital platforms, making them fast, discoverable, and inclusive.

Work history

Relevant work experience and skills

My work ensures websites are rendered, crawled, and interpreted effectively by browsers, search engines, and AI-driven systems, while delivering optimal performance and accessibility for users.

By strengthening the technical foundation of the web, I help organizations create resilient digital platforms that perform reliably for both humans and machines.

2022 - 2026

Iron/Out

Iron/Out is a specialized consultancy that focuses on making websites faster and more efficient through performance optimization and technical expertise.

  • Senior Web Performance Consultant
2013 - 2022

OrangeValley

OrangeValley is a consultancy firm that combines marketing, technology, and data analytics to help businesses grow their digital presence and performance.

  • Principal Consultant (SEO / WPO)
  • Senior SEO Consultant
  • Knowledge Driver SEO
2012 - 2013

Omnicom Media Group

Omnicom Media Group Netherlands combines leading media agencies and specialist teams to deliver strategic media planning, data-driven marketing, and digital transformation for major brands.

  • Director SEO & Analytics
2006 - 2012

GroupM

GroupM is WPP's global media investment and management group, bringing together leading media agencies and specialist capabilities to deliver data-driven media strategy, planning, buying, and digital transformation for some of the world's largest brands.

  • Technical SEO Consultant
  • Technical Digital Consultant
2001 - 2005

Mindshare

Mindshare is a global media agency within WPP, delivering strategic media planning, buying, and data-driven marketing solutions to help brands grow and connect with their audiences.

  • Technical Digital Consultant
  • Digital Planner
1999 - 2001

Mapa Spontex

Mapa Spontex is a European company specializing in household and professional cleaning and protection products, combining innovation and practical design to deliver effective solutions for consumers and professional users.

  • Marketing Assistant

Clients and brands I've worked with

Through agency and consultancy roles

Simyo
KPN
Frasers Group
Van de Velde
Marie Jo
VGZ
Sarda
Van de Valk
Primadonna
Centraal Beheer
De Jong Intra Vakanties
Independer
Eleganza
Hunkemöller
Sports Direct
Flannels
SmartBuyGlasses
Rivièra Maison
Ministerie van Volksgezondheid, Welzijn en Sport
Talisman Travel Design
Aegon
Beter Bed
Fugro
iCulture
House of Fraser
McDonalds
TomTom
Mercedes-Benz
Monster
Albert Heijn
Cordaid
Unilever
Telfort
CanDo
Nelson
"Ask Sander anything and you can trust to get a high quality and comprehensive answer back. His passion, experience and knowledge of technical aspects of the web make Sander a valuable addition to any web related team. His specialties include building web applications, SEO and web standards."
Eduard Blacquière
E
Eduard Blacquière
Freelance SEO Consultant
Get in touch

I'd love to hear from you

Feel free to get in touch using the form below or another method. I usually respond within a few days.

I typically respond within 1-2 business days.